Warping artificial yarns



Dec. 28, 1937. C.'HARGREAVES ET AL WARPING ARTIFICIAL YARNS Filed Dec.13, 1935 INVENTORS CL\FFORD HARGREAVES ROLAND BOOTH KW ATTORNEY-YPatented Dec. 28, 1937 WARPING ARTIFICIAL YARNS Clifford Hargreaves andRoland Booth, Drummondville, Quebec, Canada, assignors to CelaneseCorporation of America, a corporation of Delaware Application December13, 1935, Serial No. 54,168

2 Claims.

This invention relates to a method and device for warping yarns andespecially for warping artificial yarns that have been sized or coatedwith other substancesin a slashing machine.

Anobject of the invention is the economic and expeditious production ofwarps having an even surface on the Warp beam and in which the ends ofyarn are separated or disassociated from each other and from which theends of yarn reel off with a substantially equal tension. Other objectsof the invention will appear from the following detailed description anddrawing.

In the drawing wherein like reference numerals refer to the same orsimilar elements in the respective views,

Figure 1 is a perspective view of a part of a warp beam winding deviceconstructed in accordance with our invention.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

In forming warps of yarns which are coated with a sizing or othermaterial there is a tendency for the yarns to become taped together intoribbons. This is especially true of warps formed of yarns of continuousfilaments which yarns have no projecting fibers to maintain themseparated and especially when the yarns are relatively smooth such asthose containing only a small If the yarn is run on to the warp beamwhile containing these ribbons or tapes it builds up irregularly.Besides the unsightly appearance of this uneven surface of a warp beam,the threads tend to come off the beam with unequal tension duringweaving, owing to the variation in diam.- eter of the beam, and thiscauses various im perfections in the fabric.

We have foundthat when the sheet of warp ends or threads is broken upinto individual or disassociated ends or threads after sizing 'orotherwise coating same and prior to being wound upon a beam that a warpresults in which the warp ends each have substantially the same tension;Warps' constructed in accordance with this invention are less liable toform a fabric having warp streaks. Further, by distributing the tensionequally on all the warp ends breakage of same is greatly reduced, thusproducing a fabric having fewer knots.

In accordance with our invention, we form warps of sized or otherwisecoated yarns, by applying the coating to the yarns grouped as awarp-sheet, drying the coating and then breaking or separating thethreads to individual ends or disassociated threads prior to windingthem onto a warp beam. Further, in accordance with our invention, weconstruct a device which separates coated and dried warp-sheets intoindividual threads prior to winding them upon a warp beam.

The device, forming a part of this invention, breaks up the ribbonformation of the warp threads or ends and thus aids in producing auniform sheet of threads running on to the warp beam resulting in auniform warp. The device may comprise a standard type slashing machinehaving means for supporting a supply beam of the kind employed with awarping mill, means for applying a coating to the warp, means forpadding the coating on to the warp, such as pressure rolls, and dryingcans for drying the coating. Further, in place of a supply beam thedevice may be equipped such that the warp threads are unwound directlyfrom a warp mill or on a warp creel through a sizing device, paddingrolls and on to the drying cans. The feed end of the device is not shownin the drawing, as any suitable type of slashing device may be modifiedin accordance with this invention to produce warps in which theindividual threads or ends are separated. 7

In the drawing there is shown a part of a slashing device, whichslashing device is constructed in accordance with our invention. Theforward end of the slashing device may be constructedin any suitablemanner as stated above. The yarns, after coming from any suitable sourceof supply and after having received a coating, are led around largeheated drums, commonly termed drying cans, the last two of which areshown on the drawing. The rearward end of the machine may comprisedrying cans I and 2 about which the threads areadapted to pass afterhaving received a coating. These cans may be supported and rotated inany suitable manner. For receiving the warp there is provided a warpbeam 3 having an axle 4 by which it may be supported and rotated.Between the warp beam 3 and the drying can 2 there is provided a roller5 supported by shaft 6 adapted to act as a guide roller for maintaininga constant level of the yarn sheet as the warp beam increases in ditheslashing device proper.

ameter. The guide roller 5 may be suitably journaled in the main frame 1of the device, only a part of which is shown on the drawing, by means ofan adjustable bearing block 8 adapted to slide in a trackway 9 and itsposition regulated and maintained by any suitable means such as athreaded screw ll operating through a tongue l2 attached to the mainframe.

Suitably attached to the main frame of the device, at a position betweenthe drying cans and the take-up warp beam, and running transversely ofthe length of the machine are two parallel supporting members l3 and I4.These supporting members l3 and It with their included mechanism may beplaced after the last drying can or between two drying cans or beforethe first drying can. At substantially each end of these transversesupporting members are shafts I5 and it, each of which carry twosprocket wheels. As more fully shown in Figure 2 one sprocket wheel llis rotatably mounted on the shaft 15 while the other sprocket wheel [8is keyed thereto by means of the key I9 and the two sprocket wheels areseparated by a collar 2|. The sprocket wheels 22 and 23 on the shaft IBare similarly mounted except that the opposite sprocket wheel is keyedto the shaft while the other is mounted in a fioating relation thereto.For instance, the sprocket wheel l! is rotatably mounted on the shaft l5while sprocket wheel 22 is keyed to the shaft 56. Suitable sprocketchains 24 and 25 are threaded about the sprocket wheels l'l--22 andl823, respectively. Suitably mounted on the sprocket chain 24 arefingers or quills 26 while fingers or quills 21. These fingers form anacute angle with the chain and are sloped opposite to the direction oftravel of the chain. Any suitable number of these fingers may beemployed. However, for the purpose of disassociating the threads of anormal size warp it is found sufficient to have the fingers spaced from1 to 2 feet apart on the chains.

Any suitable driving means source of power may be employed. In thedrawing one means of driving the chains is shown. This comp-rises asprocket chain 28 adapted to register with the sprocket wheel on asuitable source of power preferably connecte'd'with the driving means ofThe chain 28 is adapted to register with and drive the sprocket wheelsuitably mounted on a shaft 3| which is journaled in the main frameas'shown at 32. Also mounted on the shaft 3| are bevel gears 33 and 34adapted to register with bevel gears 35 and 36 on the shafts l5 and i6,respectively. By this arrangement the chains 24 and 25 are driven inopposite direction at a uniform rate of speed,

preferably synchronized with the speed of the take-up warp beam 3 andthe drying cans I and 2.

The fingers or quills '26 and 2'! may be made of any suitable material,preferably such a material that has a slight springiness and ofconstituents'which will not react with the materials of the coating. Forinstance, these fingers may be formed of strips of cellulose nitrate,cellulose acetate or vulcanized fiberboard or they may be formed ofmetal such as strips of copper, brass, stainless steel or similar metal.

In the operation of the device a sheet of yarns drawn from a suitablesource of supply, such as a warp beam, a warp mill or direct from acreel is passed through a bath containing the desired coating materialand then through nip rollers which pad this material into the sheet ofthreads.

The sheet of threads having a coating applied thereto are then passedaround a series of drying cans, any suitable number of which may beemployed, for instance, 2 to 10 or more. When the sheet of threadsleaves the last drying can the threads of the sheet are taped togetherin bunches which bunches may contain anywhere from 2 to 50 or morethreads making the warp sheet'appear as a plurality of ribbons ofvarying widths. This sticking together into ribbon-like bands of theWarp is commonly termed taping. The object of the invention is to breakup these tapes into individual threads allowing the same to pass on tothe warp beam in an even sheet of individual filaments havinguniformtension and uniform size, so that in a weaving operation theypass through heddles, harnesses and, other parts of the looms with aneven tension without fraying or cutting of the individual filaments orthreads by too great a pull as was formerly required to separate thethreads of the tape band. 1

The fingers on the chains are of such a length and the guide roller isadjusted to such a position that the said fingers protrude through thesheet of the warp threads by about th to of an inch. The speed of thechains carrying the fingers may be of any suitable speed dependingsomewhat upon the spacing of the fingers or quills thereon. Although anysuitable speed maybe employed, it is preferable and the best results areproduced by resulting the speed of the chains to about double the speedof the warp yarn. I

This invention is applicable to the treatment of warps made of any typeof textile thread. However, it is of particular importance in connectionwith threads of synthetic filaments or of silk which are formed fromcontinuous links of filaments and contain no beard, nap or fuzz tendingto maintain the individual threads separated from each other andespecially when such threads have only a limited amount of twist saybelow 10 turns per inch. It is particularly applicable tothe treatmentof warps consisting solely of threads formed of organic derivatives ofcellulose, such as the organic esters and ethers of cellulose. Examplesof the organic esters of cellulose are cellulose acetate, celluloseformate, cellulose propionate and cellulose butyrate, while examples ofthe ethers of cellulose are ethyl cellulose, methyl cellulose and benzylcellulose. However, the invention may be applied to warps of mixedthreads containing some threads of organic derivatives of cellulose,mixed in any manner of alteration, with threads or yarns of othermaterials, such as silk, wool, cotton, linen, etc.

The coating material applied to the yarns may be any suitable coatingmaterial, such as sizes, lubricants, saponifying or sensitizing materialor other suitable coating substance. The invention is particularlyapplicable to the applying of a size containing gelatin to warps formedof organic derivative of cellulose threads. The size may be prepared,for instance, by mixing gelatin, glycerine, oil and water to the properconsistency.

It is to be understood that the foregoing detailed description is givenmerely by way of illustration and that many variations may be madetherein Without departing from the spirit of our invention.

Having described our invention, What we desire to secure by LettersPatent is:

1. In a slashing device, the combination with means for drying a sheetof warp threads and a take-up warp beam, of means positioned between thedrying means and the take-up warp beam for disassociating any adherentthreads in the sheet of Warp threads, said disassociating meanscomprising a plurality of oppositely moving bands adapted to traveltransversely of the sheet of warp threads and members on the bandsadapted to contact with the sheet of warp threads for separating anyadherent threads therein.

2. In a slashing device, the combination with means for drying a sheetof warp threads and take-up warp beam, of means positioned between thedrying means and the take-up warp beam for disassociating any adherentthreads in the sheet of warp threads, said disassociating meanscomprising two oppositely moving endless bands adapted to traveltransversely of the sheet of warp threads and fingers mounted on saidbands adapted to project through the sheet of warp threads forseparating any adherent threads therein.

